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To improve the specification of stratospheric, horizontal, temperature and geopotential height fields needed for high-flying aircraft, we derived a technique to estimate data between satellite tracks using interpolated infrared interferometer spectrometer 15-µm radiation data from Nimbus 3. The interpolation is based on the observed gradients of the medium resolution infrared 15-µm radiances between subsatellite tracks. The technique was verified with radiosonde data taken within 6 hr of the satellite data. The sample varied from 1,126 pairs at low levels to 383 pairs at 10 mb using Northern Hemisphere data for June 15-July 18, 1969. The data were separated into five latitude bands. The root-mean-square (rms) temperature differences were generally from 2° to 5°C for all levels above 300 mb. From 500 to 300 mb, differences vary from 4° to 9°C except at high latitudes, where the differences were near 3°C. The rms differences between radiosonde heights and those calculated hydrostatically from the s...

Determination of Stratospheric Temperature and Height Gradients From Nimbus 3 Radiation Data